172246da4SFelipe Balbi /** 272246da4SFelipe Balbi * dwc3-pci.c - PCI Specific glue layer 372246da4SFelipe Balbi * 472246da4SFelipe Balbi * Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com 572246da4SFelipe Balbi * 672246da4SFelipe Balbi * Authors: Felipe Balbi <balbi@ti.com>, 772246da4SFelipe Balbi * Sebastian Andrzej Siewior <bigeasy@linutronix.de> 872246da4SFelipe Balbi * 95945f789SFelipe Balbi * This program is free software: you can redistribute it and/or modify 105945f789SFelipe Balbi * it under the terms of the GNU General Public License version 2 of 115945f789SFelipe Balbi * the License as published by the Free Software Foundation. 1272246da4SFelipe Balbi * 135945f789SFelipe Balbi * This program is distributed in the hope that it will be useful, 145945f789SFelipe Balbi * but WITHOUT ANY WARRANTY; without even the implied warranty of 155945f789SFelipe Balbi * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 165945f789SFelipe Balbi * GNU General Public License for more details. 1772246da4SFelipe Balbi */ 1872246da4SFelipe Balbi 1972246da4SFelipe Balbi #include <linux/kernel.h> 2046a57283SStephen Rothwell #include <linux/module.h> 2172246da4SFelipe Balbi #include <linux/slab.h> 2272246da4SFelipe Balbi #include <linux/pci.h> 23e9af9229SFelipe Balbi #include <linux/pm_runtime.h> 2472246da4SFelipe Balbi #include <linux/platform_device.h> 25a89d977cSHeikki Krogerus #include <linux/gpio/consumer.h> 26a89d977cSHeikki Krogerus #include <linux/acpi.h> 27*cf48305dSHeikki Krogerus #include <linux/delay.h> 288f317b47SHuang Rui 2972246da4SFelipe Balbi #define PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3 0xabcd 3041adc59cSJohn Youn #define PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3_AXI 0xabce 31e8095a25SJohn Youn #define PCI_DEVICE_ID_SYNOPSYS_HAPSUSB31 0xabcf 32b62cd96dSHeikki Krogerus #define PCI_DEVICE_ID_INTEL_BYT 0x0f37 3385601f8cSDavid Cohen #define PCI_DEVICE_ID_INTEL_MRFLD 0x119e 349a5a0783SJohn Youn #define PCI_DEVICE_ID_INTEL_BSW 0x22b7 3584a2b61bSHeikki Krogerus #define PCI_DEVICE_ID_INTEL_SPTLP 0x9d30 3684a2b61bSHeikki Krogerus #define PCI_DEVICE_ID_INTEL_SPTH 0xa130 37b4c580a4SHeikki Krogerus #define PCI_DEVICE_ID_INTEL_BXT 0x0aaa 381ffb4d5cSHeikki Krogerus #define PCI_DEVICE_ID_INTEL_BXT_M 0x1aaa 39b4c580a4SHeikki Krogerus #define PCI_DEVICE_ID_INTEL_APL 0x5aaa 4072246da4SFelipe Balbi 41a89d977cSHeikki Krogerus static const struct acpi_gpio_params reset_gpios = { 0, 0, false }; 42a89d977cSHeikki Krogerus static const struct acpi_gpio_params cs_gpios = { 1, 0, false }; 43a89d977cSHeikki Krogerus 44a89d977cSHeikki Krogerus static const struct acpi_gpio_mapping acpi_dwc3_byt_gpios[] = { 45a89d977cSHeikki Krogerus { "reset-gpios", &reset_gpios, 1 }, 46a89d977cSHeikki Krogerus { "cs-gpios", &cs_gpios, 1 }, 47a89d977cSHeikki Krogerus { }, 48a89d977cSHeikki Krogerus }; 49a89d977cSHeikki Krogerus 50ce046d32SHeikki Krogerus static int dwc3_pci_quirks(struct pci_dev *pdev, struct platform_device *dwc3) 512cd9ddf7SHeikki Krogerus { 522cd9ddf7SHeikki Krogerus if (pdev->vendor == PCI_VENDOR_ID_AMD && 532cd9ddf7SHeikki Krogerus pdev->device == PCI_DEVICE_ID_AMD_NL_USB) { 54*cf48305dSHeikki Krogerus struct property_entry properties[] = { 55*cf48305dSHeikki Krogerus PROPERTY_ENTRY_BOOL("snps,has-lpm-erratum"), 56*cf48305dSHeikki Krogerus PROPERTY_ENTRY_U8("snps,lpm-nyet-threshold", 0xf), 57*cf48305dSHeikki Krogerus PROPERTY_ENTRY_BOOL("snps,u2exit_lfps_quirk"), 58*cf48305dSHeikki Krogerus PROPERTY_ENTRY_BOOL("snps,u2ss_inp3_quirk"), 59*cf48305dSHeikki Krogerus PROPERTY_ENTRY_BOOL("snps,req_p1p2p3_quirk"), 60*cf48305dSHeikki Krogerus PROPERTY_ENTRY_BOOL("snps,del_p1p2p3_quirk"), 61*cf48305dSHeikki Krogerus PROPERTY_ENTRY_BOOL("snps,del_phy_power_chg_quirk"), 62*cf48305dSHeikki Krogerus PROPERTY_ENTRY_BOOL("snps,lfps_filter_quirk"), 63*cf48305dSHeikki Krogerus PROPERTY_ENTRY_BOOL("snps,rx_detect_poll_quirk"), 64*cf48305dSHeikki Krogerus PROPERTY_ENTRY_BOOL("snps,tx_de_emphasis_quirk"), 65*cf48305dSHeikki Krogerus PROPERTY_ENTRY_U8("snps,tx_de_emphasis", 1), 662cd9ddf7SHeikki Krogerus /* 672cd9ddf7SHeikki Krogerus * FIXME these quirks should be removed when AMD NL 68*cf48305dSHeikki Krogerus * tapes out 692cd9ddf7SHeikki Krogerus */ 70*cf48305dSHeikki Krogerus PROPERTY_ENTRY_BOOL("snps,disable_scramble_quirk"), 71*cf48305dSHeikki Krogerus PROPERTY_ENTRY_BOOL("snps,dis_u3_susphy_quirk"), 72*cf48305dSHeikki Krogerus PROPERTY_ENTRY_BOOL("snps,dis_u2_susphy_quirk"), 73*cf48305dSHeikki Krogerus { }, 74*cf48305dSHeikki Krogerus }; 752cd9ddf7SHeikki Krogerus 76*cf48305dSHeikki Krogerus return platform_device_add_properties(dwc3, properties); 772cd9ddf7SHeikki Krogerus } 782cd9ddf7SHeikki Krogerus 79a89d977cSHeikki Krogerus if (pdev->vendor == PCI_VENDOR_ID_INTEL && 80a89d977cSHeikki Krogerus pdev->device == PCI_DEVICE_ID_INTEL_BYT) { 81a89d977cSHeikki Krogerus struct gpio_desc *gpio; 82a89d977cSHeikki Krogerus 83a89d977cSHeikki Krogerus acpi_dev_add_driver_gpios(ACPI_COMPANION(&pdev->dev), 84a89d977cSHeikki Krogerus acpi_dwc3_byt_gpios); 85a89d977cSHeikki Krogerus 862df033caSUwe Kleine-König /* 872df033caSUwe Kleine-König * These GPIOs will turn on the USB2 PHY. Note that we have to 882df033caSUwe Kleine-König * put the gpio descriptors again here because the phy driver 892df033caSUwe Kleine-König * might want to grab them, too. 902df033caSUwe Kleine-König */ 912df033caSUwe Kleine-König gpio = gpiod_get_optional(&pdev->dev, "cs", GPIOD_OUT_LOW); 922df033caSUwe Kleine-König if (IS_ERR(gpio)) 932df033caSUwe Kleine-König return PTR_ERR(gpio); 942df033caSUwe Kleine-König 95a89d977cSHeikki Krogerus gpiod_set_value_cansleep(gpio, 1); 96a89d977cSHeikki Krogerus gpiod_put(gpio); 97a89d977cSHeikki Krogerus 982df033caSUwe Kleine-König gpio = gpiod_get_optional(&pdev->dev, "reset", GPIOD_OUT_LOW); 992df033caSUwe Kleine-König if (IS_ERR(gpio)) 1002df033caSUwe Kleine-König return PTR_ERR(gpio); 1012df033caSUwe Kleine-König 1022df033caSUwe Kleine-König if (gpio) { 103a89d977cSHeikki Krogerus gpiod_set_value_cansleep(gpio, 1); 104a89d977cSHeikki Krogerus gpiod_put(gpio); 105a89d977cSHeikki Krogerus usleep_range(10000, 11000); 106a89d977cSHeikki Krogerus } 107a89d977cSHeikki Krogerus } 108a89d977cSHeikki Krogerus 109bb7f3d6dSJohn Youn if (pdev->vendor == PCI_VENDOR_ID_SYNOPSYS && 110bb7f3d6dSJohn Youn (pdev->device == PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3 || 111bb7f3d6dSJohn Youn pdev->device == PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3_AXI || 112bb7f3d6dSJohn Youn pdev->device == PCI_DEVICE_ID_SYNOPSYS_HAPSUSB31)) { 113*cf48305dSHeikki Krogerus struct property_entry properties[] = { 114*cf48305dSHeikki Krogerus PROPERTY_ENTRY_BOOL("snps,usb3_lpm_capable"), 115*cf48305dSHeikki Krogerus PROPERTY_ENTRY_BOOL("snps,has-lpm-erratum"), 116*cf48305dSHeikki Krogerus PROPERTY_ENTRY_BOOL("snps,dis_enblslpm_quirk"), 117*cf48305dSHeikki Krogerus { }, 118*cf48305dSHeikki Krogerus }; 119bb7f3d6dSJohn Youn 120*cf48305dSHeikki Krogerus return platform_device_add_properties(dwc3, properties); 121bb7f3d6dSJohn Youn } 122bb7f3d6dSJohn Youn 1232cd9ddf7SHeikki Krogerus return 0; 1242cd9ddf7SHeikki Krogerus } 12572246da4SFelipe Balbi 12641ac7b3aSBill Pemberton static int dwc3_pci_probe(struct pci_dev *pci, 12772246da4SFelipe Balbi const struct pci_device_id *id) 12872246da4SFelipe Balbi { 12972246da4SFelipe Balbi struct resource res[2]; 13072246da4SFelipe Balbi struct platform_device *dwc3; 131b09e99eeSAndy Shevchenko int ret; 132802ca850SChanho Park struct device *dev = &pci->dev; 13372246da4SFelipe Balbi 134f1c7e710SAndy Shevchenko ret = pcim_enable_device(pci); 13572246da4SFelipe Balbi if (ret) { 136802ca850SChanho Park dev_err(dev, "failed to enable pci device\n"); 137802ca850SChanho Park return -ENODEV; 13872246da4SFelipe Balbi } 13972246da4SFelipe Balbi 14072246da4SFelipe Balbi pci_set_master(pci); 14172246da4SFelipe Balbi 142124dafdeSSebastian Andrzej Siewior dwc3 = platform_device_alloc("dwc3", PLATFORM_DEVID_AUTO); 14372246da4SFelipe Balbi if (!dwc3) { 144802ca850SChanho Park dev_err(dev, "couldn't allocate dwc3 device\n"); 145f1c7e710SAndy Shevchenko return -ENOMEM; 14672246da4SFelipe Balbi } 14772246da4SFelipe Balbi 14872246da4SFelipe Balbi memset(res, 0x00, sizeof(struct resource) * ARRAY_SIZE(res)); 14972246da4SFelipe Balbi 15072246da4SFelipe Balbi res[0].start = pci_resource_start(pci, 0); 15172246da4SFelipe Balbi res[0].end = pci_resource_end(pci, 0); 15272246da4SFelipe Balbi res[0].name = "dwc_usb3"; 15372246da4SFelipe Balbi res[0].flags = IORESOURCE_MEM; 15472246da4SFelipe Balbi 15572246da4SFelipe Balbi res[1].start = pci->irq; 15672246da4SFelipe Balbi res[1].name = "dwc_usb3"; 15772246da4SFelipe Balbi res[1].flags = IORESOURCE_IRQ; 15872246da4SFelipe Balbi 15972246da4SFelipe Balbi ret = platform_device_add_resources(dwc3, res, ARRAY_SIZE(res)); 16072246da4SFelipe Balbi if (ret) { 161802ca850SChanho Park dev_err(dev, "couldn't add resources to dwc3 device\n"); 162f1c7e710SAndy Shevchenko return ret; 16372246da4SFelipe Balbi } 16472246da4SFelipe Balbi 165802ca850SChanho Park dwc3->dev.parent = dev; 1669caeb06eSHeikki Krogerus ACPI_COMPANION_SET(&dwc3->dev, ACPI_COMPANION(dev)); 16772246da4SFelipe Balbi 168ce046d32SHeikki Krogerus ret = dwc3_pci_quirks(pci, dwc3); 169474799f0SHeikki Krogerus if (ret) 170474799f0SHeikki Krogerus goto err; 171474799f0SHeikki Krogerus 17272246da4SFelipe Balbi ret = platform_device_add(dwc3); 17372246da4SFelipe Balbi if (ret) { 174802ca850SChanho Park dev_err(dev, "failed to register dwc3 device\n"); 1752cd9ddf7SHeikki Krogerus goto err; 17672246da4SFelipe Balbi } 17772246da4SFelipe Balbi 178e9af9229SFelipe Balbi device_init_wakeup(dev, true); 179e9af9229SFelipe Balbi device_set_run_wake(dev, true); 180ce046d32SHeikki Krogerus pci_set_drvdata(pci, dwc3); 181e9af9229SFelipe Balbi pm_runtime_put(dev); 182e9af9229SFelipe Balbi 18372246da4SFelipe Balbi return 0; 1842cd9ddf7SHeikki Krogerus err: 18572246da4SFelipe Balbi platform_device_put(dwc3); 18672246da4SFelipe Balbi return ret; 18772246da4SFelipe Balbi } 18872246da4SFelipe Balbi 189fb4e98abSBill Pemberton static void dwc3_pci_remove(struct pci_dev *pci) 19072246da4SFelipe Balbi { 191e9af9229SFelipe Balbi device_init_wakeup(&pci->dev, false); 192e9af9229SFelipe Balbi pm_runtime_get(&pci->dev); 193a89d977cSHeikki Krogerus acpi_dev_remove_driver_gpios(ACPI_COMPANION(&pci->dev)); 1942cd9ddf7SHeikki Krogerus platform_device_unregister(pci_get_drvdata(pci)); 19572246da4SFelipe Balbi } 19672246da4SFelipe Balbi 197782df20cSJingoo Han static const struct pci_device_id dwc3_pci_id_table[] = { 19872246da4SFelipe Balbi { 19972246da4SFelipe Balbi PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS, 20072246da4SFelipe Balbi PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3), 20172246da4SFelipe Balbi }, 20241adc59cSJohn Youn { 20341adc59cSJohn Youn PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS, 20441adc59cSJohn Youn PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3_AXI), 20541adc59cSJohn Youn }, 206e8095a25SJohn Youn { 207e8095a25SJohn Youn PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS, 208e8095a25SJohn Youn PCI_DEVICE_ID_SYNOPSYS_HAPSUSB31), 209e8095a25SJohn Youn }, 2107d643664SAlan Cox { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BSW), }, 211b62cd96dSHeikki Krogerus { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BYT), }, 21285601f8cSDavid Cohen { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_MRFLD), }, 21384a2b61bSHeikki Krogerus { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SPTLP), }, 21484a2b61bSHeikki Krogerus { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SPTH), }, 215b4c580a4SHeikki Krogerus { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BXT), }, 2161ffb4d5cSHeikki Krogerus { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BXT_M), }, 217b4c580a4SHeikki Krogerus { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_APL), }, 2189755449dSHuang Rui { PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_NL_USB), }, 21972246da4SFelipe Balbi { } /* Terminating Entry */ 22072246da4SFelipe Balbi }; 22172246da4SFelipe Balbi MODULE_DEVICE_TABLE(pci, dwc3_pci_id_table); 22272246da4SFelipe Balbi 223e9af9229SFelipe Balbi #ifdef CONFIG_PM 224e9af9229SFelipe Balbi static int dwc3_pci_runtime_suspend(struct device *dev) 225e9af9229SFelipe Balbi { 226e9af9229SFelipe Balbi if (device_run_wake(dev)) 227e9af9229SFelipe Balbi return 0; 228e9af9229SFelipe Balbi 229e9af9229SFelipe Balbi return -EBUSY; 230e9af9229SFelipe Balbi } 231e9af9229SFelipe Balbi 232e9af9229SFelipe Balbi static int dwc3_pci_pm_dummy(struct device *dev) 233e9af9229SFelipe Balbi { 234e9af9229SFelipe Balbi /* 235e9af9229SFelipe Balbi * There's nothing to do here. No, seriously. Everything is either taken 236e9af9229SFelipe Balbi * care either by PCI subsystem or dwc3/core.c, so we have nothing 237e9af9229SFelipe Balbi * missing here. 238e9af9229SFelipe Balbi * 239e9af9229SFelipe Balbi * So you'd think we didn't need this at all, but PCI subsystem will 240e9af9229SFelipe Balbi * bail out if we don't have a valid callback :-s 241e9af9229SFelipe Balbi */ 242e9af9229SFelipe Balbi return 0; 243e9af9229SFelipe Balbi } 244e9af9229SFelipe Balbi #endif /* CONFIG_PM */ 245e9af9229SFelipe Balbi 246e9af9229SFelipe Balbi static struct dev_pm_ops dwc3_pci_dev_pm_ops = { 247e9af9229SFelipe Balbi SET_SYSTEM_SLEEP_PM_OPS(dwc3_pci_pm_dummy, dwc3_pci_pm_dummy) 248e9af9229SFelipe Balbi SET_RUNTIME_PM_OPS(dwc3_pci_runtime_suspend, dwc3_pci_pm_dummy, 249e9af9229SFelipe Balbi NULL) 250e9af9229SFelipe Balbi }; 251e9af9229SFelipe Balbi 25272246da4SFelipe Balbi static struct pci_driver dwc3_pci_driver = { 2530949e99bSFelipe Balbi .name = "dwc3-pci", 25472246da4SFelipe Balbi .id_table = dwc3_pci_id_table, 25572246da4SFelipe Balbi .probe = dwc3_pci_probe, 2567690417dSBill Pemberton .remove = dwc3_pci_remove, 257e9af9229SFelipe Balbi .driver = { 258e9af9229SFelipe Balbi .pm = &dwc3_pci_dev_pm_ops, 259e9af9229SFelipe Balbi } 26072246da4SFelipe Balbi }; 26172246da4SFelipe Balbi 26272246da4SFelipe Balbi MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>"); 2635945f789SFelipe Balbi MODULE_LICENSE("GPL v2"); 26472246da4SFelipe Balbi MODULE_DESCRIPTION("DesignWare USB3 PCI Glue Layer"); 26572246da4SFelipe Balbi 26695656336SGreg Kroah-Hartman module_pci_driver(dwc3_pci_driver); 267